upload file to dropbox by java

Question

I am working on creating a simple desktop program in Java, and I want to upload files via this program to Dropbox, but the problem is that the access token has a short life (temporary), how can I make the access token have a long life, or if I can use the App key and App secret?

I need a simple solution like a method or a java example.

Is there anything better than Dropbox in this aspect and more flexible?

Thanks for any help.

This method works fine but the access token expires after a few hours

    private void testUplaod() throws FileNotFoundException, IOException, DbxException {
        DbxClientV2 client;
        DbxRequestConfig config = new DbxRequestConfig("dropbox/TestUplaod");
        
        try (InputStream in = new FileInputStream("D:\\t1.txt")) {
            client = new DbxClientV2(config, ACCESS_TOKEN);

            FileMetadata metadata = client.files().uploadBuilder("/t1.txt")
                    .uploadAndFinish(in);
        }

I was expecting it would work sustainably.

score 0 · Answer 1 · answered Nov 09 '22 at 17:54

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When you get the access token, you should also receive a refresh token. When the access token expires, you make an API call with the refresh token to get a new one.

answered Nov 09 '22 at 17:54

Jesse Barnum

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Thank you But where do I get the refresh token? when I click on Generate access token it only gives me one token – Mostafa Hajjat Nov 09 '22 at 18:02

score 0 · Answer 2 · answered Nov 09 '22 at 18:17

Dropbox is no longer offering the option for creating new long-lived access tokens. Dropbox is switching to only issuing short-lived access tokens (and optional refresh tokens) instead of long-lived access tokens. You can find more information on this migration here.

Apps can still get long-term access by requesting "offline" access though, in which case the app receives a "refresh token" that can be used to retrieve new short-lived access tokens as needed, without further manual user intervention. It's not possible to get a refresh token from the "Generate" button; you need to use the OAuth flow. You can find more information in the OAuth Guide and authorization documentation. There's a basic outline of processing this flow in this blog post which may serve as a useful example.

The official Dropbox Java SDK can actually handle the process for you automatically, as long as you supply the necessary credentials, e.g., as shown retrieved in the examples.

upload file to dropbox by java

2 Answers2